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1. LCD Projectors vs. DLP Projectors -
Which is right for you?
The Differences between LCD and
DLP Projector Technology

2. What we should know first?
• When shopping for a digital projector, your first question
might well be: “Which type of projector technology is the
best, and what is the difference?”
• The two main contenders are Liquid Crystal Display (LCD)
projectors and Digital Light Processing (DLP) projectors.
These terms refer to the mechanism the projector uses
internally to compose images. It can be a hard decision as
both projection technologies have strengths and
weaknesses, and it is important to know the differences so
you can choose which technology matches your needs.
Here we will explain the technology behind LCD and DLP
projectors, and then compare them so you are better
placed to make a decision on which type of projector to buy.

3. How does LCD technology work?
• LCD projectors project light onto mirrors
which split it up into its 3 primary colours: red,
green and blue. The colours then pass through
three separate glass panels (actually prisms),
which is why this technology is referred to as
3LCD. When light is projected through the LCD
panels, individual pixels are opened or closed
to allow light through or block it. The separate
colours are then converged using another
prism and projected on to the screen.

4. How does DLP technology work?
• Digital Light Processing is a proprietary system developed by Texas
Instruments, and works differently to LCD projection. Most DLP projectors
have a single chip instead of glass panels through which light is passed,
and this chip has a reflective surface composed of thousands of tiny
mirrors which correspond to individual pixels. These mirrors can move
back and forth when light is beamed onto the chip to direct the light from
individual pixels either towards the projector lens or away from it. In order
to define colours, DLP projectors have a colour wheel that consists of red,
green and blue filters. This wheel spins between the light source and the
DLP chip and alternates the colour of the light hitting the chip between
red, green and blue. The mirrors tilt away from or into the lens path
depending on how much of each color is required for each pixel at any
given moment.
The two technologies are therefore quite different, and so it is not surprising
that LCD and DLP projectors differ in terms of their performance and their
usefulness for different applications.

5. What are the advantages of LCD
Projectors?
• LCD projectors have historically had three main advantages over DLP
projectors.
• More accurate colours
DLP projectors often have a clear section in their colour wheel which boosts
brightness but reduces colour saturation. LCD projectors do not have a colour
wheel.
• Sharper image
LCD projectors have a slightly sharper image than DLP projectors at equal
resolutions. This can actually be a drawback which we will come to below.
• More light-efficient
This means that the same wattage lamp in an LCD and DLP would produce a
brighter image in the LCD.

6. The disadvantages of LCD Projectors
The historical disadvantages of LCD are more relevant to video than data applications.
• Screen door effect
The sharper image produced by LCD projectors can actually be a disadvantage, since the more precise focusing
makes the pixilation (“chicken wiring” or “screen door effect”) of an image more obvious.
• Contrast
LCD contrast may not be as good compared to DLP, meaning that LCDs cannot produce completely black images.
Both of the above are less of a problem with newer, higher resolution 3LCD models.
• Portability
LCD projectors have more parts and so are bulkier and less portable than DLPs.
• Image degradation
More parts means more parts which can go wrong. LCD panels can experience long term image degradation
where colour balance shifts and overall contrast is reduced. LCD panels can be expensive to replace.
• Dead pixels
Dead pixles can become a problem in LCD projectors, where one or more pixels turn permanently on or off.
With one pixel, the effect is hardly noticeable, but it can become an annoyance if this happens in clusters of
pixels.

7. What are the advantages of DLP
Projectors?
DLP projectors are a favourite amongst road warriors and home theatre
enthusiasts for several reasons:
• Portability
DLP projectors tend to be smaller and easier to transport since they have one
chip compared to the LCD’s 3 panels.
• Higher Contrast
The deep blacks achievable with DLP projectors make them very popular for
home cinema applications.
• Reduced Pixilation
This is especially noticeable in comparisons of lower-end LCD and DLPs, and
makes DLP a popular choice for smooth video applications.
• Reliability
DLPs tend to fail less often due to fewer parts and are less expensive to repair.
DLP projectors have sealed optics, making them ideal for use in dusty
environments.

8. The disadvantages of DLP Technology
• The Rainbow effect
When looking away from the projected image of a DLP projector to an
off-screen object, or when looking quickly from one side of the screen
to the other, you may experience a “rainbow” effect – a momentary
flash of rainbow-coloured stripes around brighter objects. This is
typically only a problem in older DLP projectors without modern, faster
6-colour wheels.
• Light leakage
Some people may also experience “light leakage” from their DLP
projector in the form of a grey band around the outside of the image.
This is caused by stray light reflecting off the edges of the mirrors on
the DLP chip. This can be avoided by installing black borders around
the screen. Again, light leakage is generally only a problem in older DLP
projectors.

9. Which technology is right for you?
• The various advantages and disadvantages of LCD and DLP projectors
mean that each is suited to different applications. Lighter, less bulky DLP
projectors are favored by presenters on the road. DLP projectors are also
very popular with home theatre enthusiasts due to the higher colour
saturation, better contrast and image stability. Entry level DLP home
theater projectors are also very affordable.
• LCD projectors are often more affordable, making them attractive for
education organizations. Their higher light output make them well suited
for classrooms and larger conference facilities, as does their increased
image sharpness which makes them good for displaying data-rich
presentations such as spreadsheets and graphs.
• In terms of market share, LCD projection technology is currently leading
DLP technology due to the larger number of projectors using the LCD
system. Sony and Epson are the largest LCD manufacturers, along with
Hitachi and Sanyo. Optoma, InFocus and BenQ, on the other hand, use
DLP technology.

10. • If you choose LCD projector, please click the link
below:
• http://www.amazon.com/Cmovie-LED-86D-Wifi-
Entertainment-
Multimedia/dp/B01C8C806S/ref=sr_1_8?s=electr
onics&ie=UTF8&qid=1456886675&sr=1-
8&keywords=Cmovie
• If you choose DLP projector, please click the link
below:
• http://www.amazon.com/Cmovie-DLP-900W-
Portable-Projector-
Multimedia/dp/B01C6XU6DY/ref=sr_1_2?s=elect
ronics&ie=UTF8&qid=1456886675&sr=1-
2&keywords=Cmovie

11. The Future of LCD and DLP enhanced
technology
• Advances in LCD technology have mainly been aimed at reducing
the “screen door” problem. These include:
Higher resolutions
Reductions in the gap between pixels
The use of Micro-Lens Array (MLA) to boost the efficiency of light
transmission through XGA-resolution LCD panels
• The latest major DLP innovation is a projector system with 3 DLP
chips instead of the usual one. The three-chip DLP is similar to LCD
technology in that the light is split up into red, green and blue by a
prism and then each colour has a separate DLP chip off which the
light is reflected. Three-chip DLP projectors are widely recognised as
having the best looking images of all projector technologies,
however they are also by far the most expensive.